Revert "use site name to make Runnymede unique within Surrey (not site group)"

This reverts commit d0ba83172d47f8e10b74051f56cba215f64b6f95.
Revert "add restriction to Runnymede to be in borough"

This reverts commit 1095be2427e7772a0b90b08dcdf003baf7b56509.